Conversion kit on the board
Wind surfing board, ready for water cycling

Conversion kit

Lower transmission
Upper transmission

Front bicycle carrier
Steering pilot

Easy preparation for conversion

Awards:

1. "INPEX"
USA

2. "BIS"
UK

3. "INOVA"
Croatia

4. "NAUTICA"
Croatia

5. "Kuala Lumpur"
Malaysia

"CONVERTIBLE WIND SURFING BOARD"

AS UNIT OR CONVERSION KIT

-ORIGINAL
PURPOSE, WIND SURFING

-ADDITIONAL,
SECOND PURPOSE, RIDING BICYCLE ON WATER WITH ASSISTANCE OF TOOTH PROFILE
BELT TRANSMISSION, POWERED BY PROPELLER

·Two sporting &
recreational requisites – three purposes.

1.Conventional
bicycle riding.

2.Conventional wind
surfing.

3.Water biking.

Wind surfing board is foreseen for surfing
during the windy weather, while during the sunny and quiet windless day is
completely useless.

For using the same board, during the quiet windless weather in sport and
recreational purpose, conversion kit can be assembled and any bicycle can be
used for water cycling by removing road wheels only. That means the bicycle in
this case becomes dual-purpose equipment too.

Preparation for installation of convertible kit on board is
very simple. It could be done by board owner himself, in case when convertible
kit is purchased separately with installing instructions. Procedure in
preparation for installation of convertible kit is: cutting the appropriate
holes in the board, where the plastic cups and guides will be glued by expanding
foam. With such preparation, Wind Surfing Board is ready for water bicycle
riding or wind surfing.

Preparation
for installing bicycle on board is very simple too, quick and does not take more
than fifteen minutes. That also means how the purpose of the board can be
changed several times a day, depending of weather and mood. In all ready
installed cups and guides, the following attachments have to be inserted:
carrier of the bicycle front wheel fork with the universal joint and steering
pulley, carrier of the bicycle rear fork with seven sprocket-wheel and belt
toothed cog-wheel, guides for the steering rope, steering rope with rope
tensioners and adjusters, steering pilot with the steering pulley. On the bottom
side of the board, the transmission assembly is inserted in to the cups with
belt toothed-cog, toothed belt, propeller and belt adjusting carriers of the
transmission. On such prepared board, the bicycle can be placed with all its
elements except road wheels and tighten with quick releasing wheel bolt on the
front carrier and wheel nuts on the rear carriers.

The
new generation, Wide Style Wind Surfing Boards are very stable, because of its
wideness and flat bottoms. They are not easy to turn over
especially knowing that water cycling take place only on windless weather. But
if for any reason we want to secure the board of turning over for 180 degrees,
the safe floater can be placed in the middle triangle of the bicycle frame with
quick connectors, which will prevent the board to turn over for more than 90
degrees. From this position, board can be easily straightened up.

When choosing
bike for water cycling (if we all ready do not posses one) it is recommended to
choose high quality ALU frame bicycle, not only because of possibility to get
rusty but because of its weight and shock absorbers. The ride with such chosen
bike will definitely give very pleasant and comfortable ride.

To ride bikes with such suspension, the carrier of rear fork is designed to
allow the frame movement up and down as shock absorbers works. The nuts-bushes
of the rear hub shaft will enable that.

Such
installation of the bike on the board, gives much more pleasure in riding than
ordinary recreational enjoyment. That is to say, placing the bike with its
chain, front sprocket-wheels and front and rear gear selectors, we choose the
transmission ratio and propeller RPM to adjust force to our ability or to obtain
maximum speed. The other words, choice of transmission ratio and speed are
almost unlimited. Knowing, that on late bicycle models, ratio between front and
rear chain pulley is 5:1 and on this transmission, ratio between upper and lower
toothed cog is 2:1 and ability of bicycle rider in average shape to turn pedals
1 1/2 times in second, calculation shows, that in that moment propeller makes
900 RPM. Considering, that with this RPM we are turning propeller with diameter
of 200 mm and three blades under the angle of 30 degrees, appears very
impressive picture about the speed we achieve. In any case, for riders with
higher demands that is not all. Transmission can be modified by exchanging
sprocket-wheels with higher ratio ones and increase ratio between upper and
lower toothed cogs. Also, propeller can be modified by increasing its blades
angle. With such modifications water cycling on the wind surfing board can
easily become a sport discipline.

Great advantage of whole system is its simplicity and lightness. Beside that,
the all turning parts are spinning on the bearings which maximally reduce any
frictions and resistance. The upper bearings are greased, while lower
transmission is fixed in sealed oil housings. The weight of whole system is
around four kilograms. The total weight of whole unit, with new generation
biggest board and alu frame bicycle is around 30 kilograms.